Door-bell



(No Model H. A. BIBRLEY.

DOOR BELL Patented'Au INVEJVTOR,

` Attorney&`

WI'mEssEs [Www UNITED STATES PATENT OFFICE.,

HENRY A. BIERLEY, OF MANCHESTER, OHIO.

DOOR-BELL.

SPECIPCATION-forming part of Letters Patent No. 347221, dated August 10, 1886. Application filed Octobcr24, 1885. Serial No. 180,&13. (No model.)

.To all whom it may concermv Be it known that I, HENRY A. BIERLEY, a citizen of the United States, and a resident ot' Manchester, in the county ot' Adams and State of Ohio, have invented certain new and useful Improvements in Door-Bells; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the samo, reference being had to the accompanying drawings, which form a part of this specification, and in which Figure l is aview of the'upper portion of a door-frame and door provided with my improved alarm-bell. Figs. 2 and 3 are vertical sectional views on line x x, Fg. 1, showing the alarm set in its operative position and set to be out of operation; and Fig. 4 is aper-spective view,on an enlarged scale, of the apparatus, showing the bellin dotted lnes.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to door-alarns; and it consists in the improved constructon and combination of parts of an alarm, which may be operated as a common door-bell as well as an alarm sounding when the door is opened, and which is capable of being set so as not to be sounded by the' opening of the door, if so desired, as hcreinafter more fully described and claimed.

In the accompanyiug drawings, the letter A indicates the upper portion of the door-f'ame, and B indicates the door, and the alarm. is secured upon the top piece of the frame, which piece is indicated by C.

The apparatus consists of a base-plate, D, which is preferably round and covered by the bell E, which is Secured upon the outer end of a post, F, projecting from the center of the base-platc. A connecting-rod, G, is pivoted at its lower end to a bell-pull, H, and at its upper end to the outer end of alever, I, which is pivoted near its inner end at the edge of the base-plate. The free end of a V-shaped spring, J, bears against the outer end of the lever from below, the other end of the springbeing secured to the base-plate, and the inner end'of the lever is provided with an *outwardly-probent at nearly right angles' and is provided with a hammer at its inner end, is rigidly secured near itsother end within an eye, T,which is pivotally secured to the 'base-plate. The outer end of this rod is bent at right angles to form a short arm, U, which presents a wider hearing surface for the end of the lever I, which bears against it and operates it, than would be the case if the wire were not so bent. A spring, M, is secured to the base-plate, and has its outer free end formed into an eye, N, which is secured around the inner portion of the inner arm of the hammer, forcing the said portio n of the hammer upward when its outer end has been raised by the lip upon the lever and has been released from the same by slippiug off from it, causing the hammer to strike the bell from the inside. A belLcraUk-Shaped hammer, O, is pivoted to rock in a vertical plane upon the base-plate, having its outwardly-projecting arm provided with the head P, and havinga spring, Q, forcing the said headed arm against the inside of the bell, and the downwardly projecting arm R of the bellcrank-shaped hammer hasa rounded arm, S, pivoted to its lower end, which arm may be engaged by the upper edge of the door when t-le'latter is opened or closed. Thesaid rounded arm is so pivoted to the lower end of the arm of the hammer 'that it will swing loosely in toward the top piece of the door-frame when the door is closed, while it will bear against the lower 'end of the hammer-arm when the door is opened and tilt the hammer with it, so that when the door is opened the downwardly-p'ojecting arm of the hammer will be forced outward and the outwardly-projecting arm of the hammer will be forced upward until the edge of the door releases the rounded arm, when the spring Will y force the head of the hammer against the bell or goug, sounding the same.

W'hen it is desired to set the alarm so that it will not be sounded by opening the door, the rounded arm is bent inward at a right angle to the downwardly-projecting armofthehammer, with its end resting against the top piece of the door-f'ame, when the door may be opened and closed without engaging the rounded arm. a The bell-pull may be secured in the middle of the door, if desired, when the alarm will be jecting cam or lip, K, cut off inclined toward secured upon the door at its upper end, and its lower end. A hammer-rod, L, which is l the alarm for sounding the bell or gong when ICC the door is opened is operated by a bar or rod projecting from the door-frame.

It will be seen that the alarm may be set so that it will not he sounded by opening or closing the door, but only by drawing the belhpull` and when it is desired to have the alarm set it is only necessary to tilt the rounded' pivoted arm downward, when the apparatus is in working order, and will operate as often :s the door is opened.

The bell will cover the entire nechanism, so that the apparatus will not look different from a common door-bell, and consequentlyvwill not arouse suspieion in anybody inspecting itthat it is an automatic door-alarn.

Having thns described my invention, I claim and desire to secure by Letters Patent of the United States- The conbination of a base-plate, a bell or cured to its outer end, snbstantialiyas and for L the purpose set fol-th.

In testimony that I claim the foregoiug as my own Ihave hereunto af'xed my signaturein presence of two witnesses.

H ENRY A. BIERLEY.

\Vtnesses:

LoUIs BAGGER, AUGUsT PETERSON. 

